赤道坐标系统用来显示天体在天球上的真实位置。
RA/dec coordinates are the standard system used to specify the position of an object in the sky.
但这种方法在中国古代没有产生，郭守敬和梅文鼎都利用《九章算术》中的结果解决了黄赤道坐标换算问题。
But this method was not produced in ancient China. Guo Shoujing and Mei Wending all made use of the results of "Arithmetic in -Nine Sections" to solve this problem.
但这种方法在中国古代没有产生，郭守敬和梅文鼎都利用《九章算术》中的结果解决了黄赤道坐标换算问题。
But this method was not produced in ancient China. Guo Shoujing and Mei Wending all made use of the results of "Arithmetic in -Nine Sections" to solve this problem.
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